CN103878237B - Method for machining high-strength steel hot stamping formed parts - Google Patents
Method for machining high-strength steel hot stamping formed parts Download PDFInfo
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- CN103878237B CN103878237B CN201410110908.8A CN201410110908A CN103878237B CN 103878237 B CN103878237 B CN 103878237B CN 201410110908 A CN201410110908 A CN 201410110908A CN 103878237 B CN103878237 B CN 103878237B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method for machining high-strength steel hot stamping formed parts. The main principle of the machining method is that partial tempering or annealing processing is carried out on the hot stamping formed parts with the uniform performance, gradient changes of the tempering or annealing temperature are achieved through heat conduction of a board, gradient changes of the performance are achieved, and the partial trimming and hole punching performance and the impact performance of the parts are improved on the premise that the high strength is kept on other portions. The method includes the implementation steps of according to three-dimensional structures of a trimming and hole punching region and an impact energy absorption region, designing corresponding high-frequency induction heating coils, partially tempering or annealing the trimming and hole punching region and the impact energy absorption region to enable the trimming and hole punching region and the impact energy absorption region to be at certain temperature, achieving the gradient changes of the tempering or annealing temperature, carrying out air cooling on the partially-tempered or partially-annealed parts to enable the partially-tempered or partially-annealed parts to be at certain temperature, and finally and rapidly moving the air-cooled hot stamping formed parts to a trimming and hole punching mold to carry out mold trimming and hole punching.
Description
Technical field
The invention belongs to high strength steel hot press-formed manufacture field, more specifically, relate to a kind of method realizing the processing in above-mentioned part edge-cutting and hole-punching and collision energy-absorbing region.
Background technology
High strength steel thermoform can reach the high strength of 1500-1700MPa, but its ductility can reduce with the rising of intensity, and some position of riding car body needs certain intensity and plasticity to absorb energy thus to improve Impact Resisting Capability.As the B post of body of a motor car, its epimere and and interlude need enough intensity to make automobile can ensure the complete of car body when withstanding shocks, prevent collision intrusion from causing occupant injury, lower end, except needing certain intensity, more needs good ductility to absorb collision energy.
The hot press-formed technique of existing high-strength steel is uniformity and the production efficiency of ensuring the quality of products, the general one-piece parts adopting once-forming acquisition even intensity.Intensity due to the hot press-formed part of high strength steel plate is high (1500-1700MPa), and conventional pierce, edging techniques are difficult to realize, and can only adopt laser cutting technique.Although along with processing cost during laser cutting device and technique ripe declines to some extent, to realize with existing heat forming technology that beat is synchronous also has any problem, therefore need multiple stage to overlap dimension laser cutting equipment and could realize synchronous with hot forming production line.The processing mode production efficiencys such as the edge-cutting and hole-punching of thermoformed parts are low, cost of investment is greatly problem anxious to be resolved.In general, mainly there is following technical problem in existing high-strength steel processing method: 1), due to the high intensity (1500 ~ 1700MPa) of thermoform, and its edge-cutting and hole-punching needs to adopt dimension laser cutting technique, and production efficiency is lower; 2) utilize different mold temperatures to obtain the method for performance gradient distribution to the cooling plastic controlling plate, its technique controlling difficulty is comparatively large, and transition region unstable properties.
Summary of the invention
For above defect or the Improvement requirement of prior art, the object of the present invention is to provide a kind of processing method of high-strength hot press-formed part, wherein by using heat transfer and material phase transformation principle, selective heating and cooling are realized in the appointed area and adjacent area that control part, thus make the target area of thermoform present the gradient distribution distribution of intensity, shear at needs, there is low-intensity in the region of punching, and realize mechanical trimming and punching, the intensity different from other position of part is realized in collision energy-absorbing region, and high strength is kept at other position of part, meet requirement of strength, thus the special workpiece processing purposes of body of a motor car B post and so on is particularly useful for.
For achieving the above object, according to the present invention, provide a kind of processing method of high-strength hot press-formed part, it is characterized in that, the method comprises the steps:
1) according to the three-dimensional structure in high-strength steel hot press-formed part edge-cutting and hole-punching region, design corresponding high-frequency induction heating coil, spiral winding is selected in punching areas, and scrap region selects the side-by-side parallel coil array changed with part conformal, and the distance of coil and part keep constant;
2) adopt high-frequency induction heating coil that described trimming, punching areas are carried out to the tempering of local or be annealed to the temperature range of 600 ~ 1000 DEG C, and keep 20-120s, in this way, utilize the heat transfer of plate to realize the thermograde change of tempering or annealing;
3) to through above-mentioned steps 2) after part carry out air cooling, the temperature range of air cooling to 100 ~ 500 DEG C;
4) thermoform after air cooling is transferred to rapidly on edge-cutting and hole-punching mould carries out mould trimming and punching.
Further, its step 1) in three-dimensional structure in also include collision energy-absorbing region, the side-by-side parallel coil array that described collision energy-absorbing regional choice and part conformal change, and the distance of coil and part keep constant.
Further, described collision energy-absorbing region has different intensity and percentage elongation from other region of part after processing.
Further, described step 2) in localized tempering or the temperature of annealing be preferably 800 DEG C.
Advantage of the present invention and beneficial effect as follows:
1) use high-frequency induction heating method higher than traditional stove heating means efficiency, firing rate is fast, and can control heating region flexibly.2) mould trimming and punching can be realized, improve production efficiency, can carry out synchronous with the beat of existing heat forming technology.3) utilize the performance profile of gradient distribution, in collision process, intensity is low and moulding high position can absorb energy greatly, thus improves the collision performance of vehicle body; 4) the present invention carries out special PROCESS FOR TREATMENT to the part after hot press-formed, does not change production technology and the Design of Dies criterion of thermoform, reduces suitability for industrialized production difficulty.
Accompanying drawing explanation
Fig. 1 is target part schematic diagram, and (e.g., local needs trimming, punching and performance requirement mainly to comprise three-dimensional structure.
Fig. 2 obtains performance by heat forming technology general at present to homogenize the schematic diagram of thermoformed parts
Fig. 3 arranges corresponding load coil and carries out the schematic diagram of tempering or annealing.
Fig. 4 is that tempering or the thermoform after annealing carry out mould trimming and punching schematic diagram.
1-high intensity region; 2,4-punching areas; 3-transition region; 5-collision energy-absorbing region; 6,7-flange scrap region; 8,11-trimming side-by-side parallel coil array; 9-punching spiral winding; The side-by-side parallel coil array in 10-collision energy-absorbing region.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the present invention is described in further detail:
Fig. 1 is the part after hot press-formed, and overall performance is homogeneous, and performance is: intensity 1500MPa, moulding 5%.Need to change the moulding by force of local according to the performance requirement of Fig. 2 and improve collision performance and edge-cutting and hole-punching performance.
According to the three-dimensional structure of part and the requirement of performance, as Fig. 2, as needed edge-cutting and hole-punching and energy-absorbing position performance requirement according to local, determine the gradient distribution distribution of part performance.In Fig. 2, the performance requirement of left-half part 1 is: intensity 1500MPa, percentage elongation 5%; The performance requirement in the collision energy-absorbing region 5 in right half part part is: intensity 600MPa, percentage elongation 15%.And part needs to carry out punching in 2,4 regions, flange trimming excision is carried out to region 6,7.
According to the gradient distribution distribution of the part performance shown in Fig. 2, design shape conforms to it and meets processing request high-frequency induction heating coil, thermoform is carried out to induction heating tempering or the annealing of local, heating temperature range: 600 ~ 1000 DEG C, the retention time is 0 ~ 120s.Fig. 3 carrys out load coil reasonable in design according to performance requirement (as Fig. 2) and initial part three-dimensional structure (as Fig. 1) to carry out tempering or annealing; Spiral winding is selected in punching, and to the side-by-side parallel coil array that scrap region and collision energy-absorbing regional choice and part conformal change, and the distance of coil and part keeps constant.
By the thermoform after above-mentioned regional area tempering or annealing with lower cooldown rate (air cooling) to certain temperature, temperature range: 100 ~ 500 DEG C.
Last as shown in Figure 4, by above-mentioned after air cooling thermoform transfer to rapidly on corresponding edge-cutting and hole-punching mould, carry out mould trimming and punching.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a method for the hot press-formed part processing of high-strength steel, it is characterized in that, the method comprises the steps:
1) according to the three-dimensional structure in high-strength steel hot press-formed part edge-cutting and hole-punching region, design corresponding high-frequency induction heating coil, spiral winding is selected in punching areas, and scrap region selects the side-by-side parallel coil array changed with part conformal, and the distance of coil and part keep constant;
2) adopt high-frequency induction heating coil that described trimming, punching areas are carried out to the tempering of local or be annealed to the temperature range of 600 ~ 1000 DEG C, and keep 20-120s, in this way, utilize the heat transfer of plate to realize the thermograde change of tempering or annealing;
3) to through above-mentioned steps 2) after part carry out air cooling, the temperature range of air cooling to 100 ~ 500 DEG C;
4) thermoform after air cooling is transferred to rapidly on edge-cutting and hole-punching mould carries out mould trimming and punching.
2. the method for the hot press-formed part processing of a kind of high-strength steel as claimed in claim 1, it is characterized in that, its step 1) in three-dimensional structure in also include collision energy-absorbing region, the side-by-side parallel coil array that described collision energy-absorbing regional choice and part conformal change, and the distance of coil and part keep constant.
3. the method for the hot press-formed part processing of a kind of high-strength steel as claimed in claim 2, it is characterized in that, described collision energy-absorbing region has different intensity and percentage elongation from other region of part after processing.
4. the method for a kind of high-strength steel as claimed in claim 1 hot press-formed part processing, is characterized in that, described step 2) in localized tempering or the temperature of annealing be preferably 800 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410110908.8A CN103878237B (en) | 2014-03-24 | 2014-03-24 | Method for machining high-strength steel hot stamping formed parts |
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| CN201410110908.8A CN103878237B (en) | 2014-03-24 | 2014-03-24 | Method for machining high-strength steel hot stamping formed parts |
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| CN103878237B true CN103878237B (en) | 2015-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104475527B (en) * | 2014-11-21 | 2016-08-24 | 东莞市豪斯特热冲压技术有限公司 | The manufacturing process of high-strength steel hot forming part zones of different smooth performance transition |
| CN104668326B (en) * | 2015-03-05 | 2016-08-24 | 山东大王金泰集团有限公司 | A kind of hot stamping method of high strength steel parts capability gradientization distribution |
| CN106702104A (en) * | 2015-11-18 | 2017-05-24 | 江苏明进汽车模具有限公司 | Softening treatment method for part of hot-punching high-strength panel |
| CN105483531A (en) | 2015-12-04 | 2016-04-13 | 重庆哈工易成形钢铁科技有限公司 | Steel for stamping formation and forming component and heat treatment method thereof |
| EP3408421A1 (en) * | 2016-01-25 | 2018-12-05 | Schwartz GmbH | Method and device for heat treating a metal component |
| KR101720501B1 (en) * | 2016-05-09 | 2017-03-28 | 주식회사 엠에스 오토텍 | High-frequency heating method for hot stamping |
| DE102017201674B3 (en) * | 2017-02-02 | 2018-03-29 | Ford Global Technologies, Llc | Method for producing a press-hardened component and press mold |
| JP6531265B2 (en) | 2017-03-27 | 2019-06-19 | 石崎プレス工業株式会社 | METHOD FOR MANUFACTURING METAL PARTS AND APPARATUS FOR MANUFACTURING METAL PARTS |
| CN107931418B (en) * | 2017-10-16 | 2020-01-21 | 武汉钢铁有限公司 | Processing method and application of 1500 MPa-grade gradient performance hot forming part |
| CN109821951B (en) * | 2018-12-06 | 2020-07-21 | 苏州普热斯勒先进成型技术有限公司 | Preparation method and device of corrosion-resistant hot stamping part |
| WO2022177540A1 (en) * | 2021-02-18 | 2022-08-25 | Duzce Universitesi Rektorlugu | A forming die and a forming method |
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| JP5011531B2 (en) * | 2007-01-17 | 2012-08-29 | 国立大学法人長岡技術科学大学 | Deep drawing machine |
| CN101486061B (en) * | 2009-02-24 | 2010-08-11 | 山东大学 | Thermoforming, hole-punching and edge-cutting integrated technique and mold of high-duty steel part |
| EP2570205A1 (en) * | 2011-09-15 | 2013-03-20 | Dieter Uschkoreit | Tool for heat forming and hardening a metal sheet |
| CN103028645A (en) * | 2012-12-31 | 2013-04-10 | 哈尔滨工业大学 | Hot stamping forming method for variable strength distribution strong-strength steel plate part |
| CN103317033A (en) * | 2013-06-24 | 2013-09-25 | 上海大学 | Forming method capable of customizing strength of ultrahigh-strength steel hot-stamped parts |
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Effective date of registration: 20200907 Address after: Liaoyuan City, Jilin province 136600 Baiquan Town Dongliao County Lian Chang village five groups Patentee after: JILIN ZHENGXUAN FRAME Co.,Ltd. Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 1037 Patentee before: HUAZHONG University OF SCIENCE AND TECHNOLOGY |
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Denomination of invention: A Method for Processing High Strength Steel Hot Stamping Formed Parts Effective date of registration: 20230925 Granted publication date: 20150415 Pledgee: Bank of China Limited Liaoyuan Branch Pledgor: JILIN ZHENGXUAN FRAME CO.,LTD. Registration number: Y2023220000097 |